A nurse has died of Ebola in the Malian capital of Bamako , the health ministry said Wednesday , sparking fears that the nation has not yet defeated the deadly virus .

This is the second confirmed Ebola fatality in the West African country . The first victim , a 2-year-old girl , died last month after she traveled to Mali with her grandmother from Guinea -- one of three countries hardest hit by the outbreak in the region .

The clinic where the nurse died has been quarantined , and the government has urged citizens to report suspected cases .

The first case prompted fears that the virus was spreading beyond Liberia , Sierra Leone and Guinea -- the three nations which have seen the most cases of Ebola .

Shortly after the toddler was diagnosed , dozens of people who came into contact with her were quarantined , including medical workers . It 's unclear whether the nurse was among those who were in contact with the child .

The virus has killed at least 4,960 people and infected more than 13,000 , mostly in the three nations , according to the World Health Organization .

There is currently no cure or vaccine for Ebola .

As the world reels from the outbreak , scores of companies are fast-tracking tests for various vaccines , and hope to have millions of experimental doses by next year .

Scientists racing to stop the epidemic are trying various experimental drugs on patients , including ZMapp and TKM-Ebola .

Health care workers in affected nations will get the first opportunity to try the experimental vaccines , the WHO said .

Ebola is spread by direct contact with the bodily fluids of an infected person .

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This is the second confirmed death from Ebola in Mali , the health ministry says

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The first case was a toddler who died last month

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The clinic where the nurse died has been quarantined , officials say